Split ring expanding implement



y 24, 1 51 4 E. B. 5mm- 2,562,128

SPLIT RING EXPANDING IMPLEMENT 2 Sheets-Sheet 1 Filed March 4, 1946 July 24, 1951 E. 3. SAWDY SPLIT RING EXPANDING IMPLEMENT Filed March 4, 1946 2 Sheets-Sheet 2 Patented July 24, 1951 2,562,128 SPLIT (RING EXPANDING IMPLEMENT Manufac u n flomp ys corporation .cf'Qhio Howell, Mich,

Application March :4, '-l.-946," Seri,alNo. 6515-823 4 Claims. (Cl.1;? .9'-. ..29)

:panding implements, the primary object in view being .to provide an implement of simple form and inexpensive construction for use in applying ;r,e, si1ien-t snap rings to shafts, and the like, or in ;removing the same, quickly, easily and safely find-Which is especially designed to expand such rings :Without cnutilating the same or otherwise impairing the usefulness thereof.

;ther and subordinate objects, also comprehended by my invention, together" with the preci:se;nature of my improvements will be readily understood when the succeeding description :and claims are read with reference to the drawings accompanying and forming .part of this specifi- Lcation.

--I-n saiddrawings Figure --1- is a viewinperspective of my improved expanding implement in a preferred embodiment thereof.

' Figure2 :is ayiewin plan,

Figure -13 is a view in front endelevationpartly broken away,

Figure A is a view in transverse section taken on:theiline:4-.-4 ofdi'igure '1, I

Figure 5 is a similar view 51-15 of Figure 1,

Figure 16 is another similar :view taken .on the lined-i=6 of Figure 1,

' Figure 7 is a fragmentary view in side elevation taken on the line isdesigned to :beused,

illustrating the manner in :which :the implement Figure ,8 is a view in perspective of the stop,

EFigure ,9 isa view in side elevation .of a snap used.

Beferring now to the drawings .by numerals, :my improved expanding implement, as shown, pomprises ,a pair of coplanar pliers type handles :1, '2 pivotally connected together for relative r-i ng with which the implement is designed to be v swin -mg movement .-toward and from each other, 1

the-pivotalconneotion having the former a pair of ears 3, "=4 secured together side by side by a screw and which project from opposed sides of said handles.

.Fonwardly of handles I, 2, the handle I is provided with a coplanar extension the form of an arcuate ring ho de 15, and h ha dl with an extension having the form of a straight fiat lever bar "I. The ring holder 6 and the lever bar I are arranged to be moyred toward .and from each other when the hapdles I, 2 are swung away from andtowand each other respectively. The ring holder ii is stepped on one side to form a .diametrical shouland a reduced half section II] ,der 9 on said side on the holder, and the lever bar 1 is offset laterally from the med-ianpla-ne of the holder 6 to worlg along side said section I0 and engage the ;-;shoulder 9 to thereby limit movement of said the pivotal connection of the a iully opened holder :6 and theiever .bar '1 toward each other.

Arcireumferentialwarcuate sided gap II is proaddediniihe'flialisection all! of the holder 6 centrally-thereof, and-on the side thereof opposite the first mentioned side, said holder is formed withan internal, circumferential edge groove I2 designed to receive a split-resilient ring I3 such zasaisrshown-in Figure :9. Such rings, as will be alnderstoodare designed to be spread apart preparatory to installing in a mechanism, or on a machine part such as a grooved-shaft, n w

.Aboss- I4 is provided on'the side of the lever abar il tacing "the :ring holder 6 and which is dei ned to fit loosely the 21 I I and is provided with a reduced front; expander wedge I5 thereon and with stepped side grooves 46. The expander wedge 45 tapers toward the outer edge of the boss M. .ns pestshowniinrignrez, the expand r :wedge I 5 lies a common plane with the groove cldrend said-wedge has a large end I1 formed in the arcs of the'groove 12, all for a purpose presentlyseen.

A *piyotedstdp is provided on the handle I, immediatelyin the rear ,1 the described pivotal conneotion end which hasthe form of a right angled stop finger I8 pivoted, as at I9, on an ear 20 on said handle I and so as to work between the han- .d-les'\I,12. Thestop finger I8 is provided with a finger ,gri-p tail piece 2| backed by a coil spring 22 interposed between the same and the handle I. A shoulder :23 on said handle I establishes a normal position of said stop finger I8 and in which position-saidfinger is arranged to limit swinging or the handles-I, .2 towardeach other into a partly closed position. A side notch 24 in the handle I provides for swinging of said stop finger I8 from normal position, and the tail piece M is arranged ,f-or operation by a finger of a hand grasping the handles I,.2 so that it may be moved rearwardly in opposition .to the spring 22 to swing said stop finger I8 f,orwardly.- A clearance notch 25 is provided in the handle and into which the stop finger LB may swing when the same is moved forwardlyirom normalposition to thereby permit the handles I, 2 to he swung toward each other into fully closed position as shown in dotted lines in Figure '7 with one'handle abutting the other. Apair of forwardly extending nose extensions 26, 21 are provided' on the holder :6 and lever bar I for swinging into abutting relation when the handles I, 2 are swung away from each other into position.

When it is desired to apply a ring I3, for in stance to a shaft, notshown, the handles I, 2 are swung away from each other into fully opened position as shown in full lines in Figure '7. In this position'of said handle I, 2 the nose extensions 26, 21ers engaged, and lever bar I has beenwung alongside the half section In of the ring hfildr 6 against the stop shoulder .9 to establish the 1 1 3! open position of said handles I, 2. The expander wedge I5 has been moved through the'gap II into the ring holder 6 clear of said gap. A ring [3 may now be positioned in the groove I2 with the split thereof straddling the small end of said expander wedge I5, as.

Now by grasping the handles I, 2 and swinging the same toward each other into the described partly closed position thereof, the expander wedge I5 may be caused to move through and into the gap II and through the split in the ring I3, in the groove I2 and thereby expanding the ring uniformly and preventing the ring from taking a permanent set. At this point, the larger end ll of the expander wedge I5 is interposed in. the split of the ring l6 and completes the inner edge of said ring, all as shown by the dot-dash lines in Figure 7, and said ring it, together with the ring holder 7 may be slipped over a shaft or the like, not shown. The ring I3 may now be released to snap into engagement with such a shaft and by swinging the tail piece 2| to move the stop finger I 8 from normal position forwardly into the clearance notch 25 and then swinging the handles I, 2 toward each other into fully closed position as shown by dotted lines in Figure '7. In this operation of the handles I, 2, the expander wedge I5 is moved completely through the split in the ring I3 so that said ring is'released to contract about the shaft, or other part on which it is being applied. During expansion of the ring l3 the ends thereof ride in the grooves shown in Figure 7.

Is as will be clear. The ring holder 6 may then I be removed 01f the shaft, in a manner which will be clear. The nose extensions 28, 2? may be inserted, when engaged, in the split of the ring I1 and then separated by swinging the handles I,

thereby expanding said ring 2 toward each other so that the ring may be opened preparatory to removing the same from the shaft, or the like. 7 The foregoing will, it is believed, sufiice to impart a clear understanding of my invention, withp out further explanation.

Manifestly, the invention, as described, is susceptible of modification without departing from the inventive concept, and right is herein reserved to such modifications as fall within the scope of the appended claims.

What I claim is: h

1. An implement for expanding resilient split snap rings comprising a pair of handles pivot,- ally connected together for relative swinging movement toward and from each other into' closed and open positions respectively a front end extension on one handle including an arcuate ring holder having a gap'therein and adapted to seat a ring inserted sidewise therein with the split opposite said gap, and a front end extension bar on the other handle provided with an expander wedge thereon spaced from the pivot of the handle and pivotally movable with the. handle in an arcuate path from central disposition in the holder adapted to pass endwise radially outwardly through said gap, saidbar and holder being movable toward each other upon swinging of said handles into open position to dispose said expander into the holder and thereby permit the ring to be inserted in said holder and around the expander, and said bar'and holder being movable upon swinging of said handles toward closed position to cause said expander to pass through the split of the ring and through said gap outwardly therein adapted to receive a split ring, said recess having a larger diameter than the normal outside diameter of said ring, a ring expander wedge normally disposed in the hollow of said body and mounted on said member for pivotal movement radially outwardl from the hollow with respect to the recess, means for moving said expander radially through the split in said ring for expanding the ring uniformly against the inner walls of said recess effective to prevent the ring from taking a permanent set, and releasable means for limiting the movement of said expander moving means at the point of maximum expansion of said ring and releasable to'allow the wedge to move out of the split of the'ring permitting the ring to return to normal size and shape.

3. An implement for expanding a split ring comprising a body having an aperture therethrough and a recess adjacent the aperture adapted to receive a split ring to be expanded, said recess having a larger diameter than the normal outside diameter of the ring, a ring expanding wedge movable radially outwardly with respect to the recess, in the plane thereof having a nose portion normally positioned adjacent the recess and wedge face surfaces thereof extending back from the nose to the base portion thereof disposed within the aperture in the body adapted to engage the ring with its Wedge face surfaces and uniforml expand the ring received in the recess against the circumferential wall of the recess eifective to prevent permanent set,.and releasable means for limiting the movement of said expander moving means at the point of maximum expansion of said ring and releasable to allow the wedge to move out of the split of the ring permitting the ring to return to normal size and shape;

4. A tool for expanding a resilient split ring comprising a body having a circular aperture therethrough, a circumferential recess adjacent the aperture having an angular peripheral wall .and a peripheral slot communicating with the recess, said recess adapted to receive a resilient split ring with the split portion thereof substantially in radial alignment with the slot, wedge shaped means normally disposed in the aperture with the nose thereof adjacent the peripheral slot movable radially outwardly through the slot 'en gageable with the ends of the ring within the split portion of the ring for expanding the ring" in the recess into peripheral abutment with the angular wall, and releasable means for limiting the movement of said expander moving means at the point of maximum expansion of said ring and releasable to allow the wedge to move out of the split of the ring permitting the ring to return to normal size and shape. f

' EARL B. SAWDY. v

REFERENCES CITED 

